docstr: 把 self.model 的模型参数值同步到 self.target_model
          
docstr_tok: ["\u628a","self.model","\u7684\u6a21\u578b\u53c2\u6570\u503c\u540c\u6b65\u5230","self.target_model"]
code: def sync_target(self):
      """把 self.model 的模型参数值同步到 self.target_model"""
      self.model.sync_weights_to(self.target_model)
  
file_path: PARL/examples/tutorials/lesson3/dqn/algorithm.py
imports: import copy
  import paddle.fluid
  import parl
  from parl import layers
label_desc: Use image node_id 4 for calling the DQN obj's underlying member method code with example usage: obj.sync_target() without return types